Studies suggest that bitter orange increases energy expenditure and lipolysis and that it acts as a mild appetite suppressant [ 25 , 27 ]. After the FDA banned the use of ephedrine alkaloids in dietary supplements in 2004 [see section on ephedra (má huáng)], manufacturers replaced ephedra with bitter orange in many products; thus, bitter orange became known as an “ephedra substitute” [ 29 ]. Although synephrine has some structural similarities to ephedrine, it has different pharmacological properties [ 27 , 30 ].
The Dietary Guidelines Advisory Committee dropped their longstanding recommendation that we should limit dietary cholesterol. Decades of research have shown that it has little effect on blood cholesterol levels, and the government’s outdated recommendations have done little more than send scrambled messages about the pros and cons of eating eggs and shrimp. So go ahead and scramble up an omelet—with the yolk. Eating the entire egg is beneficial to your body because it contains metabolism-stoking nutrients, including fat-soluble vitamins, essential fatty acids, and choline—a powerful compound that attacks the gene mechanism that triggers your body to store fat around your liver. To learn more about the flat-belly benefits of eggs, check out these What Happens to Your Body When You Eat Eggs .